4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
MIL-PRF-38534 QUALIFIED
Servo Amplifer
Motor Driver
TYPICAL APPLICATIONS
MSK0021
1 ISC+
2 +VCC
3 GND
4 Compensation
5 -Input
6 +Input
7 -VCC
8 ISC
1
PIN-OUT INFORMATION
Rev. A 6/03
ISO 9001 CERTIFIED BY DSCC
FEATURES:
Available as SMD #5962-8508801
High Output Current - 2 Amps Peak
Low Power Consumption-Class C Design
Programmable Current Limit
High Slew Rate
Continuous Output Short Circuit Duration
Replacement for LH0021
EQUIVALENT SCHEMATIC
MSK0021
HIGH POWER
OP-AMP
M.S KENNEDY CORP.
0021
SERIES
HIGH POWER
OP-AMP
MSK0021FP
DESCRIPTION:
The MSK 0021, 0021FP and 0021FPG are general purpose Class C power operational amplifiers. These amplifiers
offer large output currents, making them an excellent low cost choice for motor drive circuits. The amplifier and load can
be protected from fault conditions through the use of internal current limit circuitry that can be user programmed with
two external resistors. These devices are also compensated with a single external capacitor. The MSK 0021 is available
in a hermetically sealed 8 pin TO-3 package. The MSK 0021FP is packaged in a 20 pin hermetic metal flatpack and the
0021FPG is lead formed by MSK.
MSK0021FP/MSK0021FPG
20 -VCC
19 NC
18 +VIN
17 NC
16 -VIN
15 NC
14 Compensation
13 NC
12 GND
11 +VCC
1 ISC-
2 ISC-
3 ISC-
4 VOUT
5 VOUT
6 VOUT
7 VOUT
8 ISC+
9 ISC+
10 ISC+
CASE-OUTPUT
CASE IS ALSO VOUT
Audio Amplifier
Programmable Power Supply
MSK0021FPG
Group A
Subgroup
-
1, 2, 3
1,2,3
1
2, 3
1
2, 3
1
2,3
-
-
4
5,6
1
2,3
-
4
5,6
4
4
4
-
4
4
5,6
4
4
STATIC
Supply Voltage Range
Quiescent Current
Power Consumption
INPUT
Input Capacitance
Input Resistance
Input Noise Voltage
OUTPUT
Settling Time
TRANSFER CHARACTERISTICS
Slew Rate
Transition Times
Overshoot
Max.
18
4.0
120
5.0
-
500
-
300
-
-
-
-
-
-
-
-
-
-
-
1.7
250
-
-
-
-
1.2
20
Typ.
15
1.0
90
0.5
-
150
-
2.0
-
3
1.0
90
-
95
-
5
14
-
12
1.2
150
4
3.0
105
-
0.3
5
Min.
12
-
-
-
-
-
-
-
-
-
0.3
70
-
80
-
-
13.0
-
10.5
0.7
50
-
1.2
100
-
-
-
Max.
18
3.5
105
3.0
5.0
300
1.0
100
300
-
-
-
-
-
-
-
-
-
-
1.6
250
-
-
-
-
1.0
20
Typ.
15
1.0
75
0.5
2.0
100
0.4
2.0
-
3
1.0
90
90
95
-
5
14
14
12
1.2
150
4
3.0
105
96
0.3
5
Min.
12
-
-
-
-
-
-
-
-
-
0.3
70
70
80
80
-
13.5
13.5
11
0.8
50
-
1.5
100
88
-
-
V
IN
= 0V
V
CM
= 0V
Either Input
F=DC
F=DC
F = 10H
Z
to 10KH
Z
R
L
=10
F =100H
Z
R
SC
= 0.5
V
OUT
= MAX
R
SC
= 5
V
OUT
= GND
0.1% 2V step
V
OUT
= 10V R
L
= 10
Rise and Fall
Small Signal
V
CC
Supply Voltage
18V
I
OUT
Peak Output Current
2A
V
IN
Differential Input Voltage
30V
V
IN
Common Mode Input Voltage
15V
R
TH
Thermal Resistance-Junction to Case
MSK 0021
2.0 C/W
MSK 0021FP/FPG
6.0 C/W
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL SPECIFICATIONS
T
ST
Storage Temperature Range -65 to +150C
T
LD
Lead Temperature Range 300C
(10 Seconds)
P
D
Power Dissipation (TO-3) 6W
T
J
Junction Temperature 150C
T
C
Case Operating Temperature Range
Military Versions (H/B/E) -55C to +125C
Industrial Versions -40C to +85C
Units
V
mA
mW
mV
V/C
nA
A
nA
nA
pF
M
dB
dB
dB
dB
V
RMS
V
V
V
A
mA
S
V/S
dB
dB
S
%
2
Rev. A 6/03
Military
Industrial
2
Input Bias Current
Output Voltage Swing
R
L
=100
F =100H
Z
Parameter
Test Conditions
4
Input Offset Current
Input Offset Voltage
Power Supply Rejection Ratio
V
CM
= 0V
F = 10H
Z
V
CM
= 10V
Output Short Circuit Current
Common Mode Rejection Ratio
V
CC
= 5V to 15V
Open Loop Voltage Gain
NOTES:
1
Unless otherwise specified, V
CC
= 15V, C
C
= 3000pF.
2
Guaranteed by design but not tested.
Typical parameters are representative of actual device performance but are for reference only.
4
Industrial grade and "E" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified.
5
Military grade devices (B/H suffix) shall be 100% tested to subgroups 1, 2, 3 and 4.
Subgroup 1, 4
T
A
= T
C
= +25C
Subgroup 2, 5
T
A
= T
C
= +125C
Subgroup 3, 6
T
A
= T
C
= -55C
6
Reference DSCC SMD 5962-8508801 for electrical specifications for devices purchased as such.
7 Subgroup 5 and 6 testing available upon request.
3
2
3
5
2
V
IN
= 0V
3
F = 10H
Z
R
L
= 1K
V
IN
= 0V
3
HEAT SINKING
To select the correct heat sink for your application, refer to the
thermal model and governing equation below.
Thermal Model:
APPLICATION NOTES
CURRENT LIMIT
The MSK 0021 has an on-board current limit scheme de-
signed to limit the output drivers anytime output current
exceeds a predetermined limit. The following formula may
be used to determine the value of the current limit resistance
necessary to establish the desired current limit.
Current Limit Connection
3
Rev. A 6/03
R
SC
=
0.7
I
SC
___
See "Application Circuits" in this data sheet for additional
information on current limit connections.
POWER SUPPLY BYPASSING
Both the negative and the positive power supplies must
be effectively decoupled with a high and low frequency by-
pass circuit to avoid power supply induced oscillation. An
effective decoupling scheme consists of a 0.1 microfarad
ceramic capacitor in parallel with a 4.7 microfarad tantalum
capacitor from each power supply pin to ground. It is also a
good practice with high power op-amps, such as the MSK
0021, to place a 30-50 microfarad capacitor with a low
effective series resistance, in parallel with the other two power
supply decoupling capacitors. This capacitor will eliminate
any peak output voltage clipping which may occur due to
poor power supply load regulation. All power supply
decoupling capacitors should be placed as close to the pack-
age power supply pins as possible.
SAFE OPERATING AREA
The safe operating area curve is a graphical representation
of the power handling capability of the amplifier under vari-
ous conditions. The wire bond current carrying capability,
transistor junction temperature and secondary breakdown
limitations are all incorporated into the safe operating area
curves. All applications should be checked against the S.O.A.
curves to ensure high M.T.B.F.
Governing Equation:
T
J
= P
D
X (R
JC
+ R
CS
+ R
SA
) + T
A
Where
T
J
= Junction Temperature
P
D
= Total Power Dissipation
R
JC
= Junction to Case Thermal Resistance
R
CS
= Case to Heat Sink Thermal Resistance
R
SA
= Heat Sink to Ambient Thermal Resistance
T
C
= Case Temperature
T
A
= Ambient Temperature
T
S
= Sink Temperature
Example:
(TO-3 PACKAGE)
In our example the amplifier application requires the output to drive
a 10 volt peak sine wave across a 10 ohm load for 1 amp of output
current. For a worst case analysis we will treat the 1 amp peak
output current as a D.C. output current. The power supplies are
15 VDC.
1.) Find Power Dissipation
P
D
=[(quiescent current) X (+V
CC
- (V
CC
))] + [(V
S
- V
O
) X I
OUT
]
=(3.5 mA) X (30V) + (5V) X (1A)
=0.1W + 6W
=6.1W
2.) For conservative design, set T
J
= +150C.
3.) For this example, worst case T
A
= +25C.
4.) R
JC
= 2.0C/W typically for the TO-3 package.
5.) Rearrange governing equation to solve for R
SA:
R
SA
= (T
J
- T
A
) / P
D
- (R
JC
) - (R
CS
)
= (150C - 25C) / 6.1W - (2.0C/W) - (0.15C/W)
= 18.5C/W
The heat sink in this example must have a thermal resistance of no
more than 18.5C/W to maintain a junction temperature of less than
+150C.
4
Rev. A 6/03
APPLICATION CIRCUITS
TYPICAL PERFORMANCE CURVES
5
Rev. A 6/03
6
Rev. A 6/03
ORDERING INFORMATION
MECHANICAL SPECIFICATIONS
NOTE: ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED
MSK0021
Part
Number
MSK 0021 E
MSK 0021
MSK 0021 B
5962-8508801X
Screening Level
Industrial
MIL-PRF-38534 CLASS H
EXTENDED RELIABILITY
DSCC - SMD
7
Rev. A 6/03
MECHANICAL SPECIFICATIONS CONTINUED
NOTE: ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED.
ESD Triangle indicates pin 1.
MSK0021FP
ORDERING INFORMATION
Part
Number
MSK 0021FP E
MSK 0021FP
MSK 0021FP H
Screening Level
Industrial
MIL-PRF-38534 CLASS H
EXTENDED RELIABILITY
DSCC - SMD
TBD
8
Rev. A 6/03
M.S. Kennedy Corp.
4707 Dey Road, Liverpool, New York 13088
Phone (315) 701-6751
Fax (315) 701-6752
www.mskennedy.com
The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make
changes to its products or specifications without notice, however and assumes no liability for the use of its products.
Please visit our website for the most recent revision of this datasheet
MECHANICAL SPECIFICATIONS CONTINUED
NOTE: ALL DIMENSIONS ARE 0.010 INCHES UNLESS OTHERWISE LABELED.
ESD Triangle indicates pin 1.
MSK0021FPG
ORDERING INFORMATION
Part
Number
MSK 0021FPG E
MSK 0021FPG
MSK 0021FPG H
Screening Level
Industrial
MIL-PRF-38534 CLASS H
EXTENDED RELIABILITY
DSCC - SMD
TBD
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